Last month we wrote a story on replacing brake lines with pre-bent and flared units. While that story covered installation tips, there was no bending or flaring involved. Since we know making your own lines for brakes, fuel, or whatever else is pretty common in the Super Chevy world, we just had to do a story on it. Instead of a brake line we decided to plumb a line that is pretty visual in the engine compartment, which is the one from the mechanical pump up to the carb.
This article will cover creating a fuel line set up that will not only have all the performance parameters like a regulator and so on it will also cover the two most common options you have--hard line and flexible tube. We will be using products from Earl's and Holley to complete our lines. With the blacked-out look taking over the show scene we will be using the ANO-TUFF line of products, which are all coated in Mil Spec black hard anodizing.
Everything will be done in a -6 size, which is equivalent to 3/8 line. This should easily support this 575hp 427. We know one of the worst parts of creating hard or soft line is figuring out what you need to order, so we will give you part numbers for everything including some of the specialty tools needed.
1 Here are all the components we want to plumb into our fuel system. The -6 fuel log (AT101195ERL) takes care of the carb no problem, but we also wanted a regulator to keep our fuel pressure correct and a nice Earl's 35-micron filter to keep the fuel as clean as possible before it gets into the little orifices in the carb. We got one of Holley's new billet regulators, which is a very nice piece. It has 4.5-to-9 psi range and 3/8 NPT ports and even has a 1/8 NPT port for a gauge (26-504). Initially we were going to build lines to all these things separately, but then we had a better idea.
2 Why not combine them all into one assembly? That's exactly what we did. We tore apart the fuel log and reconfi gured it. Now the regulator and fi lter are incorporated and we think it looks pretty dang sweet. We used as many fi ttings as possible and only needed to make up one small section of hardline. Starting at the fuel fi lter, here is the break down of what we have: A -6 fi lter (AT230106ERL) to a -6 swivel-to-swivel (AT915112ERL), then a -6 to 3/8 NPT 90-degree (AT982266ERL) that feeds up into the bottom of the regulator (12-840). Coming out of the front port of the regulator is a -6 swivel to 3/8 male NPT straight (AT916166ERL) to a -6 to -6 90-degree adapter (AT982106ERL), and then to a -6 B-nut to 7/8-20 extension (AT915393LERL) that threads into the fuel bowl. Lastly, coming out of the back of the regulator we have a -6 to 3/8 NPT straight male (AT981666ERL) to a hardline we made with two tube nuts (AT581806ERL), two tube sleeves (AT581906ERL), and a short section of tube. The rest is the same as the front fuel bowl components. Now all we need to do is focus on running one clean line from the fuel pump to the inlet of the fi lter. Total cost of this new fuel log assembly is $294.35, but remember we have a billet regulator, liquid fi lled gauge, and AN fi lter in place, which are premium parts. Holley of ers lower cost units if your budget is less forgiving.